What does "valid logonuser and logonpassword must be specified to gain access to this system" mean?

This error indicates that the logonuser and logonpassword attributes are missing from the JDBC URL. For example:

logonuser='Thomas Hardy'
logonpassword=p455w0rd

Note The user you specify with logonuser must be able to log on to the machine where the Easysoft JDBC-ODBC Bridge server is running.